1.

1). 2142). 723). 1684). 216

Answer»

Let the no. be X. then,CORRECT ANSWER = 8x/7 and wrong answer = 7x/8. Then

8x/7 - 7x/8 = 45 

⇒ (64x - 49x)/56 = 45

⇒ 15x/56 = 45

x = 168



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